839.    ENGINEERING.  Fischer-Tropsch Hydrogenation Process.  Vol. 146, 1938, p. 517; Chem. Abe, vol. 38, 1938, p. 164.

      The importance of pilot-plant operation to bring out various difficulties not apparent in laboratory investigation is pointed out.  It is important to keep the catalyst at the correct temperature.  The various ranges of fuels that may be treated and the different types of products obtained are described in detail, and it is stated that Fischer-Tropsch products have a high H₂ content.  The primary products may be used for the synthetic production of lubricants.  Recent developments have given greater elasticity to the process with respect to the products obtained.